数组-条件求和(Code)

static void Main(string[] args)
{
    // Generate data
    int arraySize;
    int[] data;
    Random rnd;

    arraySize = 32768;
    data = new int[arraySize];

    rnd = new Random(0);
    for (int c = 0; c < arraySize; ++c)
        data[c] = rnd.Next(256);

    // Test
    long sum = 0;
    CodeTimer.Time("unsorted array", 100000, () =>
    {
        for (int c = 0; c < arraySize; ++c)
        {
            if (data[c] >= 128)
                sum += data[c];
        }
    });

    Array.Sort(data);

    sum = 0;
    CodeTimer.Time("sorted array", 100000, () =>
    {
        for (int c = 0; c < arraySize; ++c)
        {
            if (data[c] >= 128)
                sum += data[c];
        }
    });
    Console.ReadKey();
}